Patents by Inventor David S. Bell

David S. Bell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9121648
    Abstract: A process for continuously providing superheated liquid to a chemical process vessel by providing a first heating device capable of heating an entire liquid effluent stream from the vessel, the first heating device receiving the entire liquid effluent stream from the vessel and returning a heated liquid stream to the vessel; filling a similar second heating device with liquid from the liquid effluent stream prior to applying any heat to the second heating device; heating and increasing the liquid effluent stream supplied to the second heating device while decreasing the liquid effluent stream provided to the first heating device until the second heating device is receiving and returning all the heated liquid stream to the vessel, while adjusting heat to the devices as needed to maintain the heated liquid below the flash point and maintain the desired total amount of superheated liquid provided to the vessel.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: September 1, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: David S. Bell, Jorge J. Castro Velez, Robert K. Cox, Donald Hugh Marlow, Charles A. Orrock, Ronald William Pagano
  • Publication number: 20140262154
    Abstract: A process for continuously providing superheated liquid to a chemical process vessel by providing a first heating device capable of heating an entire liquid effluent stream from the vessel, the first heating device receiving the entire liquid effluent stream from the vessel and returning a heated liquid stream to the vessel; filling a similar second heating device with liquid from the liquid effluent stream prior to applying any heat to the second heating device; heating and increasing the liquid effluent stream supplied to the second heating device while decreasing the liquid effluent stream provided to the first heating device until the second heating device is receiving and returning all the heated liquid stream to the vessel, while adjusting heat to the devices as needed to maintain the heated liquid below the flash point and maintain the desired total amount of superheated liquid provided to the vessel.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 18, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: DAVID S. BELL, JORGE J. CASTRO VELEZ, ROBERT K. COX, DONALD HUGH MARLOW, CHARLES A. ORROCK, RONALD WILLIAM PAGANO
  • Patent number: 8218587
    Abstract: Embodiments are directed to systems and methods for adjusting a wavelength, bandwidth or both. Such systems and methods may be applicable to laser beams within a laser cavity or amplifier. For some embodiments, such systems and methods may be used to allow a user to set a desired wavelength and bandwidth of a short pulse laser system for operation at those parameters without further adjustment by the user.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: July 10, 2012
    Assignee: Newport Corporation
    Inventors: Ventzislav Stoev, Kevin Holsinger, David S. Bell, Olaf Korth
  • Publication number: 20110292954
    Abstract: Embodiments are directed to systems and methods for adjusting a wavelength, bandwidth or both. Such systems and methods may be applicable to laser beams within a laser cavity or amplifier. For some embodiments, such systems and methods may be used to allow a user to set a desired wavelength and bandwidth of a short pulse laser system for operation at those parameters without further adjustment by the user.
    Type: Application
    Filed: May 28, 2010
    Publication date: December 1, 2011
    Inventors: Ventzislav Stoev, Kevin Holsinger, David S. Bell, Olaf Korth
  • Patent number: 6504858
    Abstract: A high power, diode pumped laser has a Nd:YVO4 gain media. Scaling to higher powers is achieved with the use of a low doped gain media, increasing the length of the gain media as well as increasing the pump volume. Passive cooling is extended to output powers of 10 W or greater.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: January 7, 2003
    Assignee: Spectra Physics Lasers, Inc.
    Inventors: Emily Cheng, Dave R Dudley, William L. Nighan, Jr., James D. Kafka, David E. Spence, David S. Bell
  • Publication number: 20010028671
    Abstract: A high power, diode pumped laser has a Nd:YVO4 gain media. Scaling to higher powers is achieved with the use of a low doped gain media, increasing the length of the gain media as well as increasing the pump volume. Passive cooling is extended to output powers of 10 W or greater.
    Type: Application
    Filed: December 20, 2000
    Publication date: October 11, 2001
    Inventors: Emily Cheng, Dave R. Dudley, William L. Nighan, James D. Kafka, David E. Spence, David S. Bell
  • Patent number: 6185235
    Abstract: A high power, diode pumped laser has a Nd:YVO4 gain media. Scaling to higher powers is achieved with the use of a low doped gain media, increasing the length of the gain media as well as increasing the pump volume. Passive cooling is extended to output powers of 10 W or greater .
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: February 6, 2001
    Assignee: Spectra-Physics Lasers, Inc.
    Inventors: Emily Cheng, Dave R. Dudley, William L. Nighan, Jr., James D. Kafka, David E. Spence, David S. Bell
  • Patent number: 5023623
    Abstract: A single aperture antenna system disposed to operate simultaneously in active radar and passive broadband modes is disclosed herein. The dual mode antenna apparatus 40 of the present invention includes a waveguide antenna array 50 which generates a first radiation pattern of a first polarization within an antenna aperture A described thereby. The antenna apparatus 40 of the present invention further includes a broadband antenna array 60 coupled to the waveguide antenna array 50 for generating a second radiation pattern of a second polarization within the aperture A.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: June 11, 1991
    Assignee: Hughes Aircraft Company
    Inventors: Donald E. Kreinheder, David S. Bell